Information
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Patent Grant
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6557301
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Patent Number
6,557,301
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Date Filed
Tuesday, October 9, 200122 years ago
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Date Issued
Tuesday, May 6, 200321 years ago
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Inventors
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Original Assignees
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Examiners
Agents
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CPC
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US Classifications
Field of Search
US
- 049 197
- 049 198
- 049 199
- 049 200
- 049 201
- 049 139
- 049 140
- 160 188
- 074 625
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International Classifications
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Abstract
The invention relates to a locking device and a door-drive device comprising a locking device for a door which can be secured against opening by unauthorized persons using force from the exterior. The locking device has a lever element consisting of two lever arms which pivot about a first pivoting shaft. A connecting element is hinged to the first lever arm for connecting the door and the second lever arm which has an engaging device.
Description
BACKGROUND OF THE INVENTION
The present invention concerns a locking mechanism for a door driven by a motorized transmission, especially an overhead door, a tilting, swinging, or sectional door for instance, whereby the locking mechanism operates in conjunction with a coupling mechanism that couples the door's panel to a carrier, the transmission moves the carrier back and forth, preventing the closed door from opening when not subjected to force by the carrier, the locking mechanism includes a lever and a connector, the lever is mounted directly or indirectly on the carrier and pivots around a first axis in two opposite directions, the lever is provided with an engagement mechanism that engages a stationary counterbearing, the counterbearing operates in conjunction with a track that guides the carrier, locking the door, the engagement mechanism engages the counterbearing as the lever pivots in one direction and disengages it as the lever pivots in the opposite direction, the connector is rigid and is preferably in the form of a connecting rod, the connecting rod has an attachment mechanism at one end that attaches it to the door panel and is pivoted at the other end to the lever around another axis that is some distance from the first axis, whereby the lever accordingly pivots around the firstaxis in the first direction when the connector is pushed while in alignment with the door and in the opposite direction when the connector is pulled while in alignment with the door. The present invention also concerns a door-drive mechanism provided with such a locking mechanism. A locking mechanism and door-drive mechanism of this genus is known from European Patent 0 743 416 A1, which will be discussed in detail hereinafter.
Motorized drive mechanisms that open and close overhead doors have long been known.
A mechanism of this genus is known from DE 2 741 539 A1 for example. They usually include a carrier, preferably a carriage, that can be moved along the track positioned horizontal above the route traveled by the door. The carrier is usually attached to the door by connecting rods. Detaching the carrier from the door or from a traction mechanism between the carrier and the drive mechanism in the event of an emergency, when the mechanism malfunctions, has also long been known.
Problems can be encountered with such drive mechanisms. The closed door can be forced up from outside by muscle power, the carrier moving in the door-opening direction without or even against the force exerted by the transmission.
Additionally preventing the carriage and/or the closed door from unauthorized opening has accordingly often been proposed. Examples of such locking mechanisms are known from German Patent 1 961 916, U.S. Pat. No. 3,704,548, German 8 802 127 U1, French A 2 349 014, U.S. Pat No. 3,909,980, and the aforesaid European Patent 0 743 416 A1.
In German Patent 1 961 916, a carrier in the form of a carriage travels back and forth along a track between two stops. The closure stop is provided with a stationary pawl. The carriage is secured in its locking position when it engages the pawl. The engaged pawl is subject to tension. To disengage the carriage, it is attached by way of a two-armed lever to a traction mechanism between it and the motorized transmission. The lever's arms act as stops, limiting its pivoting motion. The free end of one arm engages below the pawl when the lever is in its locking position. When the traction mechanism is actuated, the lever pivots before the carrier begins moving. The pawl is accordingly lifted and disengaged, releasing the carrier. This drive mechanism is indeed provided with a coupling mechanism that couples a carrier in the form of a carriage to the door, but the coupling mechanism pivots around the same axis as the lever, although independently thereof.
In the mechanism disclosed in U.S. Pat. No. 3,704,548, it is the upper end of the door and not the carrier in the form of a carriage that is locked. Releasing the tensioned locking device again in order to open the door requires a highly complicated system of levers and slides.
German 8 802 127 U1 discloses a locking mechanism wherein a connecting rod attached to the door lifts a carrier when force is applied to the door from outside and accordingly engages the carrier with a cogged rack or with a chain above it. This locking mechanism is not completely reliable. The carrier can move at a right angle to its intended direction, resulting in unpleasant rattling and imprecise movement. The carrier can even tilt out of alignment and impinge on the rack or chain in ordinary operation.
French A 2 349 014 discloses a locking mechanism wherein the connecting rod that comprises the coupling mechanism travels back and forth in a slot in the carrier. A pawl on the connecting rod pivots around a pin accommodated in the slot and engages a counterbearing on the track. As the carrier leaves its locking position, the connecting rod is pulled along the slot, disengaging the pawl by way of a sloping plane. The mechanism known from U.S. Pat. No. 3,909,980 also employs means of displacement comprising a pawl in conjunction with a slot and a sloping plane to lever the pawl out of its engagement against a counterbearing. Generally, devices of this genus, which exploit displacement of a rod in relation to a carrier, are problematic with respect to wear and are complicated to manufacture and to install and adjust on site.
The locking mechanism of the aforesaid genus known from European Patent 0 743 416 A1 on the other hand has proven very reliable and easy to manufacture and install. The connecting rod employed therein between the carrier and the door is not directly attached to the carrier but to a lever that pivots around an axis on the carrier. A coupling mechanism constituting a toggle composed of the rigid connector, which is in the form of a connecting rod, and the lever, couples the carrier to the door. The lever has only one arm and is provided with a hooked pawl in the vicinity of another pivoting axis and engaging a notch in the vicinity of the track. This mechanism has few moving parts, and they only pivot among themselves and are not relatively displaced. The mechanism is accordingly very simple and operates reliably in that, with the exception of the pawl, none of the components slide along any of the others, which would subject them to wear. The mechanism is also very easy to install and adjust.
Even this known mechanism, however, needs improvement with respect to its adaptability to various installation situations. The toggle for instance allows the connecting rod to rotate only to a limited extent without detriment to the function of the pawling system. This is of disadvantage in particular when the track is to be mounted high above the doorway. The site might also provide insufficient vertical space, in the opening and closing direction, that is, in which event a shorter connecting rod would be desirable. The limits dictated by the operation of the toggle will still be too narrow in some situations.
SUMMARY OF THE INVENTION
The object of the present invention is an improved locking mechanism and associated drive mechanism of the genus disclosed in European Patent 0 743 416 A1 that will operate just as reliably and that can be manufactured, installed, and adjusted just as easily while adapting readily to a wider range of situations on site.
This object is attained in accordance with the present invention in a locking mechanism of the aforesaid genus in that the lever comprises two arms, the connector being attached to the arm, and in that the mechanism that engages the counterbearing while or after the lever and hence the second arm pivots in the first direction, pushing the connector attached to the door, and that disengages the counterbearing while or after the lever and hence the second arm pivots in the opposite direction, pulling the connector attached to the door, is mounted on the second lever arm.
These amazingly simple measures allow the connector or connecting rod to be farther uncoupled from the lever. The connector, specifically the connecting rod, that is, can be attached to the door at a wider range of angles, while the lever is rotated in the first direction only when subjected to force in the opening direction.
A door-drive mechanism with a locking mechanism of this species can accordingly be installed considerably above the doorway and be provided with shorter connecting rods.
Advantageous embodiments of the present invention are addressed by the subsidiary claims.
Various types of engagement mechanism can be employed. The mechanism can for example be a pin that engages a barbed structure from a depression therein. In a simpler and preferred embodiment, however, the end of the second lever arm pointing along the first pivoting direction is provided with an engagement mechanism in the form of a hook or nose that hooks onto or engages behind the counterbearing while or after the lever pivots in the first direction and releases it while or after the lever pivots in the second direction.
To facilitate directly transmitting the pushing and pulling forces from the carrier to the door by way of the coupling mechanism, the lever and connecting rod, that is, during normal operation, one advantageous embodiment of the locking mechanism in accordance with the present invention features two stops, the first stop limiting the motion of the lever as it pivots in the first direction once engagement has been achieved and the second stop limiting the motion of the lever's first and/or second arm as it pivots in the second direction once engagement has been achieved. The lever can accordingly pivot only to a limited extent, just far enough to engage or disengage.
The regulations that govern the safe operation of doors driven by motorized drive mechanisms prescribe that the doors can be opened in emergencies and when their drive mechanisms malfunction. This demand is of particular importance when the door is the only form of access to the other side. For such events, one particularly advantageous embodiment of the drive mechanism in accordance with the present invention features an emergency unbarring mechanism that disengages the lever, allowing the door to be opened by muscle power. The locking mechanism can accordingly be released when the drive mechanism malfunctions, in the event of a power failure for example, and the drive mechanism will not stand in the way of opening the door by muscle power. Since many door-drive mechanisms are self-inhibiting, however, it is not only the locking mechanism itself that must be overcome when opening the door by muscle power, but the motorized transmission itself. It will accordingly be of advantage for the emergency unbarring mechanism that unlocks the locking mechanism and uncouples the door to be constituted by the motorized transmission itself. It will be of further advantage in this case for the emergency unbarring mechanism to be provided for this purpose with a separating mechanism that separates the carrier from the motorized transmission. The separating mechanism in one preferred embodiment can be provided with an unlocking-lever component that manually shifts the carrier out of a normal position, wherein the carrier is coupled to the motorized transmission, and into a detachment position, wherein the carrier is detached from the motorized transmission, especially by traction means. The separating mechanism can for example be actuated by way of manually actuated traction means. The traction means can for example comprise a traction cord accessible from inside the door and/or a Bowden cord accessible from outside. Other means—levers, rods, etc. for example—of actuating the emergency unbarring mechanism are of course also conceivable. Although manual actuation is preferred, automatic actuation by way of an emergency mechanism of some sort is also possible.
To ensure that the locking mechanism can be unlocked to allow the door to be opened by muscle power, the emergency unbarring mechanism in one embodiment of the present invention can include means of applying tension, especially in the form of a spring that maintains the lever in its release position. The engaging component in all known locking mechanisms is maintained in its engaged position subject to tension. Although this feature does ensure that the engagement mechanism will engage and remain engaged as long as the door remains closed, it is not absolutely necessary in that the engagement mechanism must only remain engaged while the door is actually subjected to force from outside. If, for example, as provided in this particular embodiment of the present invention, the lever is maintained in its release position by tension, the advantage will be that the door can easily be opened by muscle power with the carrier coupled by way of the traction mechanism without having to first shift the engaging mechanism out of its engaged position. All that would be necessary to disengage the system in an emergency in such an embodiment would be to uncouple the carrier from the motorized transmission.
Practice has demonstrated, however, that this theoretically simplest approach is not sufficient in all cases to ensure absolutely reliable emergency unbarring. The emergency unbarring mechanism in one preferred embodiment of the present invention can accordingly include an unlocking mechanism that will when actuated shift and in particular force the lever out of its engaged position or locking position, whereupon the door panel can be pulled or pushed up, allowing the door to be opened subject to muscle power in an emergency.
The unlocking mechanism is also preferably designed such that, when the emergency unlatching mechanism is actuated, by tugging on the traction means for example, it will not pivot the second lever arm out of its engagement position and into its release position until the separating mechanism has separated the carrier. The emergency unbarring mechanism can accordingly be operated in two phases. In the first, the carrier is uncoupled from the motorized transmission. In the next phase, as the emergency unbarring mechanism continues to be actuated, by continuous tugging on the traction means for example, the locking mechanism will be unlocked. The unlocking mechanism that unlocks the locking mechanism in one concrete and advantageous embodiment is mounted on, located on, or associated with the unlocking-lever component that unlocks the carrier from the motorized transmission such that it will not, as the unlocking-lever component pivots out of its normal position and beyond its unlocking position, seize a vicinity of the lever that pivots along with the second lever arm such that the second lever arm will pivot in the second direction, until the unlocking-lever component has traveled beyond its unlocking position. In the simplest version of this embodiment, both the unlocking mechanism and the unlocking-lever component comprise a single component, that will, as it pivots out of its normal position around an acute angle, uncouple the carrier from the motorized transmission and, as it continues beyond that angle, seize the locking mechanism's lever and force it out of its engagement position. In the simplest version, the unlocking mechanism is constituted by the unlocking-lever component itself, whereby once it has traveled beyond its unlocking position, the unlocking-lever component will directly seize the lever and push or pull it out of its engagement position. The unlocking-lever component in one preferred embodiment can be pivoted manually, especially by way of the traction means. The unlocking-lever component is connected to a coupling pin. The pin is in particular tensioned in the coupling position and couples the carrier to the traction mechanism. As it pivots into the unlocking position, the unlocking-lever component releases the pin. The unlocking-lever component is preferably provided with a contact vicinity that contacts a matching contact area on the lever, pivoting the second lever arm out of its engagement position and into its release position.
The contact area of the lever that constitutes the locking lever in another preferred embodiment is provided with a third lever arm that is connected to and pivots along with the second lever arm around the first axis. The third lever arm extends into the vicinity wherein the unlocking-lever component pivots such that, when the lever is in its engagement position and the unlocking-lever component in its normal position, the third arm will be far enough from one arm of the unlocking-lever component to allow emergency unbolting to take place in two phases. It is in this event preferable for the distance to be long enough to prevent the unlocking-lever component and the third lever arm from seizing each other until the unlocking-lever component has pivoted out of its normal position and beyond its unlocking position such that the second arm of the lever can be released as the unlocking-lever component continues pivoting.
One concrete embodiment of the present invention features a bearing that accommodates the lever, whereby the bearing extends downward from the carrier when the mechanism is employed as intended, the carrier travels back and forth along a track, the track extends horizontally above the route traveled by the door panel as the door opens, the first axis is provided against the bearing extending downward as viewed from a specified angle and at a distance from the horizontal track when the mechanism is employed as intended, and the first and/or the second axis are preferably provided on the bearing. This situation can be attained for example if the bearing is provided with a housing in the form of a sleeve or is sleeve-like or cylindrical, with the lever coming to rest against the interior wall surface of the housing upstream and/or downstream and above and/or below the axis during the pivoting motion.
Instead of the bearing that establishes a position below the carrier track. The first axis can be accommodated inside the carrier itself. In this case, the lever will be accommodated inside the carrier. The interior wall surfaces of the housing that face the first lever arm will preferably act as the first and/or second stop. The second axis will, however, preferably be below the carrier track when the mechanism is employed as intended.
The first lever arm in one especially advantageous embodiment can extend for this purpose downward, essentially downward, that is, from the first axis in when the mechanism is employed as intended such that, as it pivots in the first direction, its free end will move in the opening direction traveled by the carrier. The lever arm need not point precisely downward but only essentially downward, extending across the direction traveled by the door panel and/or the carrier and accordingly transmitting the maximum of torque. Due to the force exerted on the connecting rod during the first attempt to open the door from outside, the first lever arm will pivot into the premisses being closed off.
The second lever arm can extend upward, essentially upward, that is, from the first axis for example when the mechanism is employed as intended such that, as the arm pivots in the first direction, its free end will move along with the engagement mechanism opposite the direction traveled by the carrier until it arrives in its engagement position. The first and second lever arm in one embodiment of the present invention can thereby extend essentially perpendicular to each other, more or less at 180°, at least in the vicinity of the first axis. This approach will simplify manufacture of the lever, which will act like a motion-reversing lever.
The lever arms in one advantageous embodiment either constitute a simple single component or are otherwise fastened together, pivoting as a whole in both directions.
The first and second lever arms in one alternative embodiment, however, can be separate components coupled together. They will then preferably be coupled together by way of a carrier mechanism such that the second lever arm will move along with the first lever arm only when pivoting in one particular direction. It is accordingly preferably subjected to tension such that both lever arms will engage each other by way of the carrier mechanism. When force is exerted against the second lever arm in opposition to the engagement provided by the carrier mechanism, however, the latter will pivot out of engagement with the first lever arm. It will in this case be preferable for both the first and second lever arm to pivot simultaneously as the carrier travels in the opening direction and to uncouple from each other, especially by pivoting relative to each other, as the carrier travels in the closing direction. The advantage here is that the second lever arm can slip beyond the counterbearing and snap into place without having to carry the first lever arm and the connector coupled thereto along with it. Furthermore, the second lever arm, once uncoupled from the first lever arm by the emergency release mechanism comprising the unlocking mechanism, can easily be shifted out of its engagement position without having to move the first lever arm and hence the coupling mechanism. With such an embodiment it is also conceivable in principle to eliminate two-phase actuation of the emergency unbolting mechanism or to unlock the locking mechanism first and then [un] couple the carrier from the motorized transmission. To ensure that the locking mechanism will remain locked in any case once the lever arms have been uncoupled, it will be preferable for the second lever arm to be tensioned, preferably by a spring, in its engagement position.
The free end of the second lever arm in another embodiment of the present invention is bent or curved along the first pivoting direction, creating the engagement mechanism, especially the hook, whereby the face of the bent or curved free end that faces the first direction is provided with a hook nose with an engagement area that seizes the counterbearing and locks it. The lever can accordingly as a whole comprise a straight, curved or, depending on the situation, bent, at an essentially right angle for example, strip of sheet metal that terminates in a hook. If the end is straight, it can act as a first lever arm for example, with a point of engagement, a bore for example, for the first axis located therein. In this case, the other end, which can be bent for example, will act as a hook that hooks onto the counterbearing as the lever pivots in the first direction. It is on the other hand also conceivable for the first and second lever arm to bend toward each other, with a bore or similar bearing for the first axis located in the vicinity of the bend. The entire second lever arm will in this case comprise a hook with a nose at the end. A third lever arm can be provided in the form of a straight extension of the second lever arm, representing a point of contact for the unlocking component.
To allow the hook to hook onto or the nose to travel beyond the counterbearing that it is to engage behind even while it is being advanced during normal operation, it will also be preferable to provide the engagement mechanism with a snap-in nose and in particular for the hook nose or nose to be in the form of a snap-in nose. The side of the snap-in nose that faces the engagement area can be provided with an on-ramp shoulder. If the engagement mechanism is also provided with an obliquely angled capture area for seizing the counterbearing, the second lever arm will not be able to hook over the counterbearing subject to powerful force as might happen if a pointed capture area were to bore into the counterbearing. Tests have indicated that reliable locking can be attained even with an obliquely angled capture area.
It will be preferable to be able to fasten the counterbearing at various points along the track. The track can for example be a rail in the form of a length of C section, the counterbearing tensioned across it from one mutually facing edge to the other. An embodiment of the present invention is preferable wherein the counterbearing simultaneously constitutes or comprises a limiting mechanism that limits the closing motion of the carrier and accordingly prescribes its closing position. It will also be preferable for /27. the counterbearing to be constituted by one edge of the limiting mechanism and especially by an edge that extends into the C section.
The locking mechanism can be adapted to various sites even more easily if /28. the connecting rod is provided with several means of attaching it to any desired point on the door panel and of articulating it to any desired point on the first lever arm. This feature will be even more advantageous if it allows various distances between the door panel and the carrier to be spanned. T /29. he connecting rod in one concrete version is preferably flat and elongated and in particular a perforated strip of metal, whereby the means of attaching it to any desired point on the door panel and of articulating it to any desired point on the first lever arm are in the form of several preferably round holes distributed along it.
BRIEF DESCRIPTION OF THE DRAWINGS
Various embodiments of the present invention will now be specified by way of example with reference to the accompanying drawing, wherein
FIG. 1
is a partly sectional lateral view of part of one embodiment of a door-drive mechanism and locking mechanism adjacent to a doorway during an attempt to open the door from outside subject to muscle power,
FIG. 2
is a cross-section along the line A A in
FIG. 1
,
FIG. 3
is a lateral view similar to
FIG. 1
of the door drive mechanism's carrier with the door closed and subject to no force,
FIG. 4
is a partly sectional lateral view similar to
FIG. 1
of part of another embodiment of a door-drive mechanism and locking mechanism,
FIG. 5
is a view of the second embodiment from below along the direction indicated arrow A in
FIG. 4
,
FIG. 6
is a view similar to
FIGS. 3 and 4
of a third embodiment of a door-drive mechanism and locking mechanism,
FIG. 7
is a view from below of the part of the third embodiment of a door-drive mechanism and locking mechanism illustrated in
FIG. 6
, and
FIG. 8
is a cross-section along the line B—B in FIG.
2
.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The figures illustrate various embodiments of a drive mechanism
3
for an overhead door
2
in the vicinity of its attachment to the door's panel
1
. More specifically, only the end of drive mechanism
3
that is to be fastened to the doorway's lintel
4
is represented. At the other end, the drive mechanism
3
is provided with an unillustrated motorized transmission that shifts a carrier in the form of a carriage
6
,
106
, or
206
back and forth between two limits, specifically a door-opening position and an illustrated door closing position subject to a traction mechanism, the cogged belt
5
in the illustrated embodiment for example. Carriage
6
,
106
, or
206
travels along a track in the form of a rail
7
comprising a length of C section like that described in WO 98/12407, which can be referred to for details. Rail
7
is fastened horizontal to lintel
4
above panel
1
and along the direction the panel opens in. A pulley
8
guides and reflects belt
5
inside rail
7
. The door opening-and-closing motions of carriage
6
,
106
, or
206
are limited by structures in the form of stops
9
like those described in WO 98/12405, which can be referred to for details.
FIGS. 1 and 3
through
7
show only the stop
9
that limits the closing motion of carriage
6
,
106
, or
206
. Stop
9
can be clamped onto rail
7
at any desired location along it, allowing adaptation to various sites of installation and limits.
The door
2
in the illustrated embodiment is a tilting door with a single flat panel
1
. The carriage
6
,
106
, or
206
that acts as a carrier in drive mechanism
3
is coupled to panel
1
by a coupling mechanism
10
,
110
, or
210
. A locking mechanism
11
,
111
, or
211
that prevents panel
1
from being opened from outside by unauthorized persons acts in conjunction with coupling mechanism
10
,
110
, or
210
. Coupling mechanism
10
,
110
, or
210
comprises a connecting rod
12
or
112
attached to carriage
6
,
106
, or
206
by way of a lever
13
,
113
, or
213
and to panel
1
by way of an L-shaped structure
14
. Such an L shaped structure
14
is described in European Patent 0 768 444 A1, which can be referred to for details. Drive mechanism
3
can be adapted to various motorized door panels
1
by way of structure
14
. Locking mechanism
11
,
111
, or
211
essentially comprises connecting rod
12
or
112
and lever
13
,
113
, or
213
, attached to carriage
6
,
106
, or
206
, in conjunction with stop
9
. The illustrated embodiments of drive mechanism
3
differ in the design of locking mechanism
11
,
111
, or
211
and in the design of an emergency unlatching mechanism
40
,
140
, and
240
that allows the door to be opened subject to muscle power in the event of an emergency, when, for example, there is a power failure or when drive mechanism
3
malfunctions for some other reason.
One embodiment of the present invention will now be specified with reference to
FIGS. 1 through 3
.
The lever
13
in this embodiment is secured in a bearing
15
on carriage
6
. Otherwise, the carriage is similar to the one described in WO 98/13569. It is accordingly provided with a groove-and-spring device
17
that includes a groove
16
and attaches it to bearing
15
. The bearing is provided with a more or less sleeve-like housing
18
that extends downward from carriage
6
and wherein lever
13
pivots to a limited extent around an axis
19
that extends perpendicular to the direction traveled by the carriage. Lever
13
has two arms. One arm
20
is positioned below axis
19
, and the other arm
21
above it.
Connecting rod
12
pivots around another axis
22
at the free end
23
of first lever arm
20
. Specifically, free end
23
is forked, and connecting rod
12
, a flat strip, is articulated between its two prongs at second axis
22
. Second lever arm
21
extends initially straight out of first axis
19
but bends at an angle paralleling first pivoting direction
30
, pointing upstream in the direction traveled by carriage
6
as the door opens. The free end
24
of second lever arm
21
terminates in a downward-pointing hook
25
. Hook
25
is provided with an on ramp shoulder
26
facing down and along the closing-motion direction and with a capture area
27
that can engage behind a limiting edge
28
of stop
9
.
The free end
24
of second lever arm
21
, with its hook
25
, shoulder
26
, capture area
27
, in conjunction with stop
9
or limiting edge
28
, accordingly constitute a barbed structure that engages a component
29
. By way of this engagement, locking mechanism maintains carriage
6
and panel
1
in the state represented in FIG.
1
.
Whereas
FIG. 1
represents engagement component
29
engaged,
FIG. 3
shows it disengaged, with lever
13
subject to the tension exerted by a spring
41
. The front and back walls of housing
18
are designed to allow lever
13
to pivot in first direction
30
around first axis
19
out of the disengaged position represented in FIG.
3
and into the engaged position represented in FIG.
1
. As it pivots, lever
13
in second direction
31
, in the opposite direction, that is, moves out of the engaged position represented in FIG.
1
and into the disengaged position represented in FIG.
3
. As the lever pivots in first direction
30
, the wall
32
of housing
18
near panel
1
acts as a stop, limiting the motion of second lever arm
21
, and the opposite wall
33
as a stop limiting the motion of first lever arm
20
. The lever's motion in second direction
31
is limited by the wall
33
farther from panel
1
on second lever arm
21
and by the wall
32
near panel
1
on first lever arm
20
.
The emergency unlatching mechanism
40
in this embodiment accordingly essentially comprises the spring
41
that maintains lever
13
in its release position and a mechanism
34
that separates the carriage
6
from belt
5
. Separating mechanism
34
comprises a traction cord
35
that pulls an unillustrated engagement pin (cf. FIG.
8
and hereinafter) out of its engagement with a cogged-band coupling
36
(
FIG. 2
) inside carriage
6
. Such a cogged-band coupling is described in WO 98/13625, which can be referred to for details.
To allow its attachment to any desired points on door panel
1
and lever
13
, connecting rod
12
is provided with several fastenings in the form of openings
37
a
. The connecting rod itself is a strip of sheet metal with openings
37
a
distributed equally along it. In other words it is perforated.
How this embodiment of the door-drive mechanism and its associated locking mechanism work will now be specified.
How drive mechanism
3
shifts the open door
2
into the closed state represented in the figures will be specified first. Lever
13
is initially in the position relative to bearing
15
and hence to carriage
6
represented in FIG.
1
. When the free end
24
of second lever arm
21
contacts stop
9
, the shoulder
26
of hook
25
slides over limiting edge
28
until capture area
27
engages behind limiting edge
28
. Carriage
6
can now continue traveling until it contacts stop
9
, coming to rest in the position represented in FIG.
1
. Door
2
will now be closed. Drive mechanism
3
will now turn off, and lever
13
will be maintained subject to tension in the position illustrated in
FIG. 3
, in the release position, that is.
FIG. 1
represents what happens when an external force is applied to panel
1
in this state. When an attempt is made to lift the door from outside, a force or push
37
is applied to connecting rod
12
along its length. Due to the articulation of connecting rod
12
to first lever arm
20
accordingly, lever
13
will pivot around first axis
19
in first direction
30
until engagement component
29
arrives in its engagement position. Second lever arm
21
will now come to rest against the stop constituted by wall
32
, and carriage
6
will be subjected to force in the opening direction. This force, however, will remain in action only until seizing area
27
comes to rest against limiting edge
28
. Panel
1
will be prevented from moving any farther in its opening direction no matter how much force is applied to the door.
It will, however, still be possible when drive mechanism
3
malfunctions due to a power failure for instance, to open door
2
by means of emergency unlatching mechanism
40
by just uncoupling carriage
6
from belt
5
with a tug on traction cord
35
and a pull on the carrier, carriage
6
, that is, in the present example, in the opening direction. As drive mechanism
3
shifts the carriage
6
in the present embodiment into the closing position against the force of spring
41
, lever
13
will preferably enter its engagement position. Spring
41
, which acts as an unbolting spring on lever
13
, is tensioned to ensure that door
2
can be lifted and opened by muscle power immediately once carriage
6
has been unbolted. This is particularly important in the event of emergency unbolting when there is no other access to the garage. A second embodiment of door-drive mechanism
3
and a second embodiment of door-locking mechanism
111
will now be specified with reference to
FIGS. 4 and 5
. Identical parts will be provided with the same reference numbers, and the specification of the first embodiment can be referred to for the overall design.
Here again locking mechanism
111
is associated with a coupling mechanism
110
that couples panel
1
to a carrier in the form of a carriage
106
. The carriage's motion is transferred to panel
1
by way of a lever
113
mounted therein and by way of a connector in the form of a connecting rod
112
.
Lever
113
comprises two lever arms
120
and
121
that pivot in two directions
30
and
31
around an axis
119
inside rail
7
.
Axis
119
is embodied by a pin
151
mounted in the carriage's housing
150
(FIG.
5
). Pin
151
extends through lever arms
120
and
121
. First lever arm
120
is constituted by two cheeks
162
and
163
, in the form of strips of metal in the present embodiment, one on each side of second lever arm
121
and connecting rod
112
. Connecting rod
112
pivots between and at the free ends
123
of cheeks
162
and
163
around another axis
122
below rail
7
.
The free end
124
of second lever arm
121
is provided with a hook
125
similar to the hook
25
in the first embodiment, with that is, an on-ramp shoulder
126
and an edge
127
that engages a limiting stop
9
. Second lever arm
121
is in the form of a length of structural section mounted on pin
151
that could as a whole be called a locking hook or locking-hook component and that extends along second lever arm
121
and beyond first axis
119
, accordingly constituting a third arm
152
for lever
133
. Third lever arm
152
bends down at its free end
153
. Between first lever arm
120
and the bent-down free end
153
of third lever arm
152
is a resilient structure, in the form of a compression spring
144
in the present example. Compression spring
144
tensions second lever arm
121
and third lever arm
152
with its locking hook in first direction
30
and accordingly maintaining second lever arm
121
in the engagement position represented in FIG.
4
.
The end of third lever arm
152
pointing away from first axis
119
is provided with an emergency unlatching mechanism
140
in the form of a contact area
154
that engages an unlocking lever component
143
.
Carriage housing
150
is provided with inner surfaces
132
and
133
that act as stops, limiting the pivoting motion of first lever arm
120
, cheeks
162
and
163
, that is. First lever arm
120
is also provided with a carrier
155
with a pin mounted between the cheeks. Carrier
155
is mounted on first lever arm
120
where it engages second lever arm
121
in the position represented in FIG.
4
.
FIG. 4
shows lever
113
in its engagement position, with lever arms
120
and
121
pivoted in first direction
30
, wherein a push
37
is being exerted on connecting rod
112
. As first lever arm
120
pivots in second direction
31
, carrier
155
will move second lever arm
121
, which accordingly shifts out of its engagement position and into an unillustrated release position.
Emergency unlatching mechanism
140
permits the door
2
to be opened by muscle power. The mechanism essentially comprises, first, a mechanism
141
that unlocks the locking lever along with its second lever arm
121
and, second, a mechanism
134
that separates a coupling between carriage
106
and means
5
of applying tension.
The unlocking mechanism includes unlocking-lever component
143
, which can by way of contact area
154
pivot third lever arm
152
and hence second lever arm
121
in second direction
31
and accordingly into its release position. Separating mechanism
134
also includes unlocking-lever component
143
, which can, before locking mechanism
111
has been unlocked by releasing second lever arm
121
, extract the spring-loaded engagement pin out of its engagement with cogged-band coupling
36
.
As will be most evident from
FIG. 5
, unlocking-lever component
143
pivots around a third axis
145
perpendicular to direction traveled by carriage
106
. The free end of the first lever arm
146
of unlocking-lever component
143
is engaged by one component of a traction means in the form of a cable bell
147
that can be actuated from inside the premisses being closed off. Another lever arm
148
is engaged by another component of the traction means in the form of a Bowden cord
142
that can be actuated from outside the premisses. Applying tension to Bowden cord
142
or cable bell
147
will pivot unlocking-lever component
143
around third axis
145
. As unlocking-lever component
143
pivots, a pin
149
that travels back and forth in a curved slot will extract the engagement pin out of engagement with the cogged-band coupling, whereupon, once a detachment position has been attained, carriage
106
will be uncoupled from cogged belt
5
. As unlocking-lever component
143
pivots out of the normal position represented in
FIG. 5
, a contact vicinity
156
on the second lever arm
148
of unlocking-lever component
143
will also engage the contact area
154
located in that normal position at some distance from contact vicinity
156
, unlocking second lever arm
121
. How this second embodiment of locking mechanism
111
, illustrated in
FIGS. 4 and 5
, operates will now be specified.
FIG. 4
shows the state of the locking mechanism while door
2
is closed. Carriage
106
is resting against limiting stop
9
, lever arms
120
and
121
have pivoted in first direction
30
, and lever
113
is in its engagement position. When an exterior force
37
is applied to panel
1
, carriage
106
will be shifted in the opening direction until the engagement component
129
constituted by second lever arm
121
with its hook
125
and engagement section
127
engages the limiting edge
28
of stop
9
. Further motion of carriage
106
and hence further opening of panel
1
subject to exterior force will be impossible.
When door-drive mechanism
3
is actuated, cogged belt
5
will drag carriage
106
in opening direction
170
. The resulting traction on connecting rod
112
will pivot first lever arm
120
in second direction
31
. Carrier
155
will engage, and lever arms
120
and
121
will pivot in second direction
31
, shifting the mechanism out of the engagement position represented in FIG.
4
and into the release position. With locking mechanism
111
unlocked, accordingly, carriage
106
can now travel in opening direction
170
until door
2
is all the way open. As the door closes, carriage
106
will move in the direction opposite opening direction
170
. First lever arm
120
will pivot in first direction
30
into the position represented in
FIG. 4
, coming to rest against interior wall surface
132
. Panel
1
can now be closed by way of carriage
106
. Second lever arm
121
will, subject to the force exerted by compression spring
144
, pivot into the engagement position represented in FIG.
4
. Once on-ramp shoulder
126
reaches limiting edge
28
, second lever arm
121
will be forced to pivot in second direction
31
against the force exerted by spring
144
but without being accompanied by connecting rod
112
until engagement section
127
travels beyond limiting edge
28
. Carriage
106
will continue moving until it comes to rest against limiting stop
9
.
When emergency unbolting is necessary, a tug on cable bell
147
from inside or on Bowden cord
142
from outside will actuate them manually. Bowden cord
142
terminates in a space not accessible to unauthorized persons outside the premisses being closed off. This is of particular importance when access to the premisses is only by way of the doorway.
The tug causes unlocking-lever component
143
to pivot, detaching carriage
106
from cogged-band coupling
36
. Contact vicinity
156
engages the contact area
154
of the bent-down free end
153
of third lever arm
152
, forcing second lever arm
121
out of its engagement position. Since lever arms
120
and
121
are separated, they will both be uncoupled, and engagement component
129
can be shifted out of its engagement position without first lever arm
120
having to move. Door
2
can now be lifted by muscle power.
Due to the uncoupling of lever arms
120
and
121
, it is unnecessary to adjust locking mechanism
111
to various situations as precisely as in the prior art. The second embodiment of locking mechanism
111
is particularly outstanding in that the lever comprising second lever arm
121
and third lever arm
152
is maintained in its engagement position or in its bolting position by a compression spring for example. This lever, which can be considered a locking hook, pivots around first axis
119
. A mechanism, in the form of cheeks
162
and
163
in this case, that attaches panel
1
to the closing rod, or connecting rod
112
, pivots around first axis
119
to a limited extent. Locking-hook lever
121
and
152
and cheeks
162
and
163
or a similar pivoting mechanism for attaching connecting rod
112
can be pivoted mutually to a certain extent around first axis
119
. This pivoting motion is limited by carrier
155
, a carrier pin, that forces locking hook lever
121
and
152
out of the bolting position or engagement position when connecting rod
112
and carriage
106
apply traction to each other and as cheeks
162
and
163
pivot.
A lever system
134
,
143
, and
140
is available for emergency unbolting. This system can be employed to force locking-hook lever
121
and
152
out of its engagement position against the force of spring
144
, subsequent to which door
2
can be lifted by muscle power.
The illustrated embodiment of locking mechanism
111
, which prevents break-ins and keeps the door closed, includes locking-hook lever
121
and
152
and two cheeks
162
and
163
connected together by a pin
155
that constitutes the carrier.
Locking-hook lever
121
and
152
is maintained in its closing position by compression spring
144
. This lever pivots along with cheeks
162
and
163
and carrier pin
155
around first axis
119
. First axis
119
is accommodated and prevented from axial displacement by pin
151
.
FIG. 4
represents the door-closing state.
As they travel during the door-closing state, the cheek surfaces extending along the carriage's opening and closing directions rest against matching carriage-guidance surfaces- interior wall surfaces
132
and
133
. Locking-hook lever
121
and
152
is in its closing or engagement position. Just prior to the door-closing state, the locking nose or hook
125
in locking-hook lever
121
and
152
will arrive at the elevated edge
28
of stationary limiting stop
9
and will accordingly rise. Once hook
125
has traveled beyond this edge, compression spring
144
will force it back into its closing or engagement position.
As they travel in door-opening direction
170
, cheeks
162
and
163
will pivot around first axis
119
, carrier pin
155
carrying locking-hook lever
121
and
152
along with it. Locking-hook lever
121
and
152
will accordingly pivot around first axis
119
, and hook
125
will rise. The door-opening motion will be unimpeded. Emergency unbolting, in the event of malfunction on the part of drive mechanism
3
for instance, can be initiated from outside by way of Bowden cord
142
or from inside by way of cable bell
147
or of a similar traction cord. Both cable bell
147
and Bowden cord
142
engage unlocking-lever component
143
, which pivots around the essentially vertical axis
145
. When tension is applied to either of these traction means, unlocking-lever component
143
will pivot around axis
145
. When unlocking-lever component
143
is actuated, its contact vicinity
156
will apply force to the oppositely directed contact area
154
of locking-hook lever
121
and
152
. The locking-hook lever will thereupon be shifted out of its closing or engagement position. Another mechanism could also be employed to maintain the unlocking-lever component unlocked following emergency unbolting, although this embodiment is not illustrated. Door
2
can be opened by muscle power once locking-hook lever
121
and
152
has been unlocked.
FIGS. 6 through 8
illustrate a third embodiment of a door drive mechanism and locking mechanism
211
. Identical parts will be provided with the same reference numbers.
The locking mechanism
211
illustrated in
FIGS. 6 through 8
includes a coupling mechanism
210
for coupling panel
1
to a carriage
206
and a connecting rod
12
that is coupled to the carriage by way of a lever
213
that pivots to a limited extent around a first axis
219
. Lever
213
has three arms
220
,
221
, and
252
. Connecting rod
12
pivots around another axis
222
at the free end of first arm
220
. The free end of second arm
221
is provided with an engagement component
229
with a nose
225
. Third arm
252
is similar to third arm
252
[sic] and is provided with a bent down end
253
with an edge that engages an unlocking-lever component
243
.
As will be evident from
FIG. 7
, lever
213
comprises two flat components united by rivets
270
. The areas of the components that constitute first arm
220
are offset, creating two cheeks
262
and
263
that enclose the lever's point of attachment to connecting rod
12
.
Nose
225
is provided with an engagement section
227
. Unlike engagement sections
27
and
127
, however, section
227
is bent down obliquely rather than acutely. Nose
225
is also provided with an on-ramp shoulder
226
.
Emergency unlatching mechanism
240
comprises a component
241
for unlocking a locking mechanism
211
and a mechanism
134
for separating carriage
206
from cogged belt
5
. Separating mechanism
234
and emergency unlatching mechanism
240
are essentially constituted by an unlocking-lever component
243
similar to unlocking-lever component
143
.
Unlocking-lever component
243
can be pivoted around a third axis
245
by way of traction means
235
that comprises a cable bell
247
.
Comparing
FIGS. 5 and 7
will reveal the differences between the emergency unlatching mechanism
240
or, more specifically, unlocking mechanism
241
employed in the second embodiment and the emergency unlatching mechanism
140
and unlocking mechanism
141
employed in the third embodiment. It will be evident that the curved slot that pin
149
or
249
travels in as it uncouples carriage
106
or carriage
206
from cogged-band coupling
36
is longer in the third embodiment and that the distance between the contact vicinity
256
on unlocking-lever component
243
and the contact area
254
on the third lever arm is longer than the distance between the contact vicinity
156
and the contact area
154
in the second embodiment.
Separating mechanism
234
will now be specified with reference to
FIG. 8
, which shows a coupling-or-engagement pin
275
similar to the ones discussed in relation to the two aforesaid embodiments and employed to couple carriage
206
to cogged-band coupling
36
. The pin
249
in unlocking-lever component
243
extends through pin
275
.
How the third embodiment of the locking mechanism operates will now be specified.
FIG. 6
represents locking mechanism
211
in the door-closing state. When drive mechanism
3
is actuated, cogged belt
5
will move carriage
206
in the opening direction
170
. The resulting traction on connecting rod
12
will pivot lever
213
around first axis
219
in second direction
31
. The pivoting motion is limited by a stop in the form of an inner wall surface
233
of carriage housing
250
. As carriage
206
continues to move in the opening direction
170
, the door will open. With lever
213
resting against the inner wall surface
233
of housing
250
, second arm
221
will be unlocked, and engagement component
229
will be in its release position. The door can be opened unimpeded.
If the motion of drive mechanism
3
is reversed, lever
213
will, due to the pushing force applied to connecting rod
12
, pivot in first direction
30
into the position illustrated in
FIG. 6
, with first arm
220
resting against a first stop in the form of one interior wall surface
232
of carriage housing
250
. The door will then close due to the accordingly established interlocking connection between connecting rod
12
and carrier
206
. Once on-ramp shoulder
226
has arrived at the stop's limiting edge
28
, lever
213
will pivot until nose
225
can slip over edge
28
and into the engagement position represented in FIG.
8
. The closing motion will continue until carriage
206
arrives at limiting stop
9
. The door is closed. If force is applied to the door from outside, it will act as a push
37
against connecting rod
12
. Carriage
206
will accordingly also be pushed in opening direction
170
until engagement section
227
arrives at limiting edge
28
. Even though engagement section
227
is not pointed, limiting edge
28
cannot be conquered because push
37
will be forcing lever
213
into its engagement position. The oblique slope toward limiting edge
28
, however, has the advantage that nose
225
cannot hook over edge
28
even subject to powerful closure forces. The obliquity also decreases wear.
Although the arms
220
and
221
in the third embodiment are in one piece in contrast to the arms in the second embodiment, emergency unbolting will still be simple and reliable. This is ensured in the third embodiment in that carriage
206
is initially uncoupled from cogged belt
5
and in that, due to the longer distance between contact vicinity
256
and contact area
254
, lever
213
cannot be forced out of engagement until uncoupling is complete. Since carriage
206
has been entirely uncoupled by this time, lever
213
having already pivoted in second direction
31
, allowing emergency unbolting, the displacement between carriage
206
and connecting rod
12
needed for the pivoting motion can be initiated without further measures by the travel of carriage
206
along rail
7
.
Locking mechanism
211
can accordingly be very easily unlocked by way of emergency unlatching mechanism
240
, and the door can be opened by muscle power.
The locking mechanism.
211
in the third embodiment is accordingly provided with a locking hook in the form of lever
213
that pivots around first axis
219
. Axis is accommodated in the carriage
206
attached to door panel
1
and prevented from axial displacement by an unillustrated cam.
FIG. 6
shows the mechanism in the door-closed state.
As the locking hook constituted by lever
213
travels in the door-closing direction, the surfaces of its cheeks
262
and
263
that face along opening direction
170
will come to rest against a surface constituted by the interior wall surface
232
of carriage
206
. The locking hook, lever
213
, is now in its closing or engagement position. Just before arriving at the door-closed position, the nose
225
of the locking hook or lever
213
will encounter the elevated limiting edge
28
of stop
9
and will accordingly be lifted. Once nose
225
has traveled past limiting edge
28
, the closing force exerted by door
2
will return the edge to its engagement position.
As it travels in the door-opening direction, the lever
213
that constitutes the locking hook will pivot around first axis
219
, lifting nose
225
. The cheeks
262
and
263
of lever
213
will simultaneously come to rest against inner wall surface
233
.
Emergency unbolting is accomplished from outside by means of Bowden cord
242
or from inside by means of cable bell
247
. Unlocking-lever component
243
can pivot around third axis
245
. Actuation of unlocking-lever component
243
will initially cause the pin
249
to shift the spring-loaded slide or the coupling-or-engagement pin
275
in direction
280
, disengaging carriage
206
from the cogged-band coupling
36
with cogged belt
5
. Further actuation of unlocking-lever component
243
will close the distance between the contact vicinity
256
of unlocking-lever component
243
and the contact area
254
of lever
213
, and contact vicinity
256
will apply force to contact area
254
. The locking hook constituted by lever
213
will pivot in the second direction around first axis
219
, and nose
225
will be lifted. The system is now unlocked and the door can be opened by muscle power.
The third embodiment is particularly outstanding in that it operates in two phases, with unbolting, i.e. the separation of the carriage from the motorized transmission, independent of unlocking, i.e. separation of the carriage from the stationary limiting stop.
The nose
225
on the lever
213
that constitutes the locking hook is not pointed. This prevents carriage
206
from hooking up as it travels in the door-opening direction in doors with powerful closing forces.
The particular characteristics of the individual embodiments specified herein can, unless obviously inapplicable, be combined in various ways to create additional embodiments.
Claims
- 1. A locking mechanism for an overhead door driven by a motorized transmission, said overhead door being one of a tilting, swinging, or sectional door; a coupling mechanism coupling a panel of said door to a carrier; said transmission moving said carrier back and forth for preventing a closed door from opening when not subjected to force by said carrier; a lever and a connector, said lever being mounted on said carrier and pivoting around a first axis in two opposite directions; said lever having an engagement mechanism engaging a stationary counterbearing operating in conjunction with a track for guiding said carrier in locking the door, said engagement mechanism engaging said counterbearing as said lever pivots in one direction and disengages said counterbearing as the lever pivots in the opposite direction, said connector being rigid and in form of a connecting rod having an attachment mechanism at one end for attaching to said door panel and being pivoted at the other end to said lever around another axis at a distance from said first axis, said lever pivoting around said first axis in a first direction when said connector is pushed while in alignment with the door and pivoting in the opposite direction when said connector is pulled while in alignment with the door; said lever comprising two arms, said connector being attached to said first arm, said engagement mechanism engaging said counterbearing while said lever and thereby said second arm pivots in said first direction and pushes said connector attached to the door, said engagement mechanism disengaging from said counterbearing while said lever and thereby said second arm pivots in said opposite direction and pulls the connector attached to the door.
- 2. A locking mechanism as defined in claim 1, wherein said second lever arm has an end pointing along the first pivoting direction with said engagement mechanism in form of a hook engaging behind said counterbearing while said lever pivots in the first direction and releasing said counterbearing while said lever pivots in the second direction.
- 3. A locking mechanism as defined in claim 1, including two stops, a first one of said stops limiting motion of said lever when pivoting in the first-direction once engagement has been achieved and the second one of said stops limiting motion of said lever when pivoting in the second direction once engagement has been achieved.
- 4. A locking mechanism as defined in claim 1, including an emergency unbarring mechanism disengaging said lever for allowing the door to be opened manually.
- 5. A locking mechanism as defined in claim 4, wherein said emergency unbarring mechanism unlocks the locking mechanism and uncouples said door panel and comprises said motorized transmission-with a separating mechanism separating said carrier from said motorized transmission.
- 6. A locking mechanism as defined in claim 5, wherein said separating mechanism has an unlocking-lever component for manually shifting said carrier out of a normal position wherein said carrier is coupled to said motorized transmission, and into a detachment position wherein said carrier is detached from said it motorized transmission by traction means.
- 7. A locking mechanism as defined in claim 4, wherein said emergency unbarring mechanism includes means of applying tension in form of a spring maintaining said lever in a release position.
- 8. A locking mechanism as defined in claim 4, wherein said emergency unbarring mechanism includes an unlocking mechanism for shifting said lever out of an engaged locking position, so that said door panel can be pulled or pushed up.
- 9. A locking mechanism as defined in claim 8, wherein said unlocking mechanism has means so that when the emergency unlatching mechanism is actuated said second lever arm will not pivot out of an engagement position and into a release position until the separating mechanism has separated said carrier.
- 10. A locking mechanism as defined in claim 9, wherein said unlocking mechanism is mounted on said unlocking-lever component so that when said unlocking-lever component pivots out of its normal position and beyond its unlocking position said unlocking mechanism will not seize a vicinity of said lever that pivots along with said second lever arm so that said second lever arm will pivot in the second direction until said unlocking-lever component has traveled beyond an unlocking position.
- 11. A locking mechanism as defined in claim 10, wherein a contact area of said lever has a third lever arm connected to and pivoting along with said second lever arm around said first axis and extending into a vicinity wherein said unlocking-lever component pivots so that, when said lever is in an engagement position and said unlocking-lever component is in a normal position, said third lever arm will be far enough from one arm of said unlocking-lever component to prevent said unlocking-lever component and said third lever arm from seizing each other until said unlocking-lever component has pivoted out of said normal position and beyond an unlocking position.
- 12. A locking mechanism as defined in claim 8, wherein said unlocking mechanism comprises said unlocking-lever component pivotable manually by traction means connected to a coupling pin and having a contact vicinity, said coupling pin being tensioned in a coupling position and coupling said carrier to said traction means, whereby when pivoting into an unlocking position said unlocking-lever component releases said coupling pin, and whereby said contact vicinity encounters a matching contact area on said lever and pivoting thereby said second lever arm out of an engagement position and into a release position.
- 13. A locking mechanism as defined in claim 12, wherein said engagement mechanism has an obliquely angled capture area for seizing said counterbearing.
- 14. A locking mechanism as defined in claim 1, including a bearing accommodating said lever and extending downward from said carrier, whereby said carrier travels back and forth along a track extending horizontally above a route traveled by the door panel as the door opens, said first axis being against said bearing-extending downward as viewed from a specified angle and at a distance from the horizontal track, whereby said bearing has a housing in form of sleeve means.
- 15. A locking mechanism as defined in claim 1, wherein said first axis is inside said carrier, whereby said stops comprise an interior wall surfaces of said carrier.
- 16. A locking mechanism as defined in claim 1, wherein said first lever arm extends downward from said first axis when pivoting in said first direction, said free end moving in an opening direction traveled by said carrier.
- 17. A locking mechanism as defined in claim 1, wherein said second lever arm extends upward from said first axis when said second arm pivots in said first direction and said free end thereof moves along with the engagement mechanism opposite a direction traveled by said carrier as the door opens.
- 18. A locking mechanism as defined in claim 1, wherein said lever arms comprise a single component pivoting in both directions.
- 19. A locking mechanism as defined in claim 1, wherein said first and second lever arms are separate components coupled together by way of a carrier mechanism so that said second lever arm moves along with said first lever arm when the latter pivots in one of the two directions, said second lever arm being subjected to tension along with the carrier in a capture position whereby both lever arms engage each other through the carrier when force is exerted against said second lever arm in opposition to the capture.
- 20. A locking mechanism as defined in claim 1, wherein said first and second lever arms pivot simultaneously as said carrier travels in opening direction and uncouple from each other by pivoting relative to each other as said carrier travels in closing direction.
- 21. A locking mechanism as defined in claim 1, wherein said second lever arm is tensioned by a spring in an engagement position.
- 22. A locking mechanism as defined in claim 1, wherein the free end of said second lever arm is bent along the first pivoting direction relative to said first lever arm to form said hook, whereby a face of the bent free end facing the first direction has a hook nose with an engagement area seizing the counterbearing and locking said counterbearing.
- 23. A locking mechanism as defined in claim 1, wherein said engagement mechanism has a snap-in nose in form of a hook nose, whereby a side of said snap-in nose facing an engagement area has an on-ramp shoulder.
- 24. A locking mechanism as defined in claims 1, wherein said counterbearing is fastenable at various points along said track.
- 25. A locking mechanism as defined in claim 24, wherein said track is a rail in form of a length of C section, said counterbearing being tensioned from one mutually facing edge to the other.
- 26. A locking mechanism as defined in claim 1, wherein said counterbearing comprises a limiting mechanism that limits the closing motion of said carrier to define a closing position.
- 27. A locking mechanism as defined in claim 1, wherein said counterbearing comprises one edge of a limiting mechanism and extending into a C section.
- 28. A locking mechanism as defined in claim 1, wherein said connecting rod has means for attaching to any desired point on said door panel and for articulating to any desired point on said first lever arm for allowing various distances between the door panel and said carrier to be spanned in accordance with a site of installation.
- 29. A locking mechanism as defined in claim 28, wherein said connecting rod is flat and elongated and comprises a perforated strip of metal, whereby said means of attaching to any desired point on the door panel and of articulating to any desired point on said first lever arm are in form of a plurality of round holes.
Priority Claims (5)
Number |
Date |
Country |
Kind |
199 28 595 |
Jun 1999 |
DE |
|
199 36 055 |
Jul 1999 |
DE |
|
199 39 624 |
Aug 1999 |
DE |
|
199 51 054 |
Oct 1999 |
DE |
|
199 51 289 |
Oct 1999 |
DE |
|
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/DE00/02027 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/79086 |
12/28/2000 |
WO |
A |
US Referenced Citations (5)